1955-1965 Autographed Baseball

My grandfather worked for Ben Topping in the late 1950's to 1960s. Mr. Topping was the owner of the New York Yankees.

I have an autographed baseball given to me by my grandfather about 40 years ago. It is a REACH baseball. It has approximately fifty signatures on it. The signatures are quite clear and in different color ink. (Different pens were used)
I'm not familiar with baseball players of that time but some of the names are:

Mickey Mantle
Casey Stengle
Ted Williams
Jim Pearsall
Bob Swift
Yogi Berra
Ray Boomer